Miles per imperial gallon fuel economy unit.
Miles per imperial gallon to Liters per kilometer Converter — mpg imp to L/km
Convert Miles per imperial gallon (mpg imp) to Liters per kilometer (L/km) using the exact conversion factor (1 miles per imperial gallon = 2.824809363 liters per kilometer). See the formula, worked examples, conversion table, history, and common uses.
Miles per imperial gallon to Liters per kilometer converter
Converter
Fuel Economy Converter
Convert MPG, km/L, L/100 km, and related transport fuel economy units.
Context values
Some unit families need one extra value for a physically accurate result.
Liters per kilometer fuel economy unit.
Normalize fuel economy to distance per volume, inverting consumption units when needed.
Fuel economy supports both distance-per-volume and volume-per-distance units.
Reserved above the conversion cards and below the converter.
About Converting Miles per imperial gallon to Liters per kilometer
Miles per imperial gallon and Liters per kilometer are two of the ways the world measures fuel efficiency, and converting between them is essential for comparing a US car's window-sticker rating to a European or Asian one. Miles per imperial gallon is most often used for uk vehicle fuel-economy figures (particularly older or enthusiast/import contexts).
Formula
Fuel economy formulas invert between distance-per-volume and volume-per-distance units as needed.
Efficiency-style units (like mpg or km/L) and consumption-style units (like L/100 km) measure the same underlying thing from opposite directions, so converting between the two families requires a reciprocal, not just a multiplication factor.
Simple example
1 mpg imp × 354006189900 = 2.824809363 L/km
1 miles per imperial gallon = 2.824809363 liters per kilometer.
Real-world example
30 mpg imp × 354006189900 = 0.0941603121 L/km
30 miles per imperial gallon = 0.0941603121 liters per kilometer.
Conversion table
| Miles per imperial gallon (mpg imp) | Liters per kilometer (L/km) |
|---|---|
| 10 mpg imp | 0.2824809363 L/km |
| 20 mpg imp | 0.1412404682 L/km |
| 30 mpg imp | 0.0941603121 L/km |
| 40 mpg imp | 0.0706202341 L/km |
| 50 mpg imp | 0.0564961873 L/km |
| 60 mpg imp | 0.0470801561 L/km |
Reverse conversion: Liters per kilometer to Miles per imperial gallon
2.824809363 L/km × 2.824809e-12 = 1 mpg imp
2.824809363 liters per kilometer = 1 miles per imperial gallon.
Fuel economy formulas invert between distance-per-volume and volume-per-distance units as needed.
For a page dedicated to this direction, see Liters per kilometer to Miles per imperial gallon.
Understanding the Miles per imperial gallon
Miles per imperial gallon (mpg imp) measures fuel economy. Miles per imperial gallon measures distance per imperial gallon (4.54609 L) — about 20% larger than the US gallon, so an imperial MPG figure is correspondingly higher for the same real efficiency. It is classified as a UK/imperial customary unit.
Where it's used: United Kingdom (historically; UK now also uses L/100km)
US mpg vs. imperial mpg. The identical term 'mpg' means a different amount depending on which gallon is used — an imperial mpg figure is about 20% higher than the equivalent US mpg for the same actual fuel efficiency, a common source of confusion when comparing US and UK/Canadian car specs.
Uses of the Miles per imperial gallon today
- UK vehicle fuel-economy figures (particularly older or enthusiast/import contexts)
- Comparing UK-market vehicle specifications to US ones
History of the Miles per imperial gallon
Imperial MPG follows the same automotive tradition as US MPG but uses Britain's imperial gallon (standardized in 1824), leading to the two systems diverging even though they share identical terminology.
Historical origin. Miles per imperial gallon was not the invention of a single named person; it developed through the process described above.
Understanding the Liters per kilometer (L/km)
Liters per kilometer fuel economy unit.
Miles per imperial gallon — sources
- UK Department for Transport — Vehicle fuel economy — Historical basis for UK mpg reporting.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many liters per kilometer are in 1 miles per imperial gallon?
1 miles per imperial gallon equals 2.824809363 liters per kilometer, using the exact defined conversion factor rather than an estimate.
How do I convert miles per imperial gallon to liters per kilometer?
Fuel economy units sometimes need inversion rather than simple multiplication — the converter above and the formula section handle this automatically.
How do I convert liters per kilometer back to miles per imperial gallon?
Use the reverse factor: 1 liters per kilometer equals 2.824809363 miles per imperial gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a miles per imperial gallon?
Miles per imperial gallon (mpg imp) measures fuel economy. Miles per imperial gallon measures distance per imperial gallon (4.54609 L) — about 20% larger than the US gallon, so an imperial MPG figure is correspondingly higher for the same real efficiency. It is classified as a UK/imperial customary unit.
What is a liters per kilometer?
Liters per kilometer (L/km) is a unit of fuel economy.
Is the miles per imperial gallon to liters per kilometer conversion exact?
Yes. Both miles per imperial gallon and liters per kilometer are defined by fixed standards rather than physical artifacts, so the factor of 354006189900 used above is exact to as many digits as you choose to display.
What is the difference between us mpg vs. imperial mpg?
The identical term 'mpg' means a different amount depending on which gallon is used — an imperial mpg figure is about 20% higher than the equivalent US mpg for the same actual fuel efficiency, a common source of confusion when comparing US and UK/Canadian car specs.
Where is the miles per imperial gallon still used today?
United Kingdom (historically; UK now also uses L/100km)